GENOTYPICALLY DEPENDENT EFFECTS OF CYROMAZINE ON REPRODUCTION AND OFFSPRING DEVELOPMENT IN THE AUSTRALIAN LUCILIA-CUPRINA (DIPTERA, CALLIPHORIDAE)

The effects of cyromazine on egg production and subsequent egg-to-adul t survival were examined on susceptible, heterozygous, and homozygous cyromazine-resistant genotypes of the Australian sheep blowfly Lucilia cuprina (Wiedemann) by administering to adults 10 ppm of cyromazine i n drinking water. Cyromazine reduced egg production, hatch, and subseq uent larval survival in susceptible genotypes by acting at the embryon ic stage of development. Resistance negated these effects dominantly f or egg production and egg hatch and in a partially dominant manner for egg-to-adult survivorship.